Volodymyr V. Lysenko and I have co-authored a paper that examines the role played by Internet-based information flows and technologies in electoral revolutions. Recent events have drawn attention to the use of Internet-based information and communication technologies (ICTs) in the political process. For instance, ICTs played an important role during attempts at electoral revolutions in Moldova in April 2009 and Iran in June 2009. Employing a case study approach, we examine the part played by ICTs during the Orange Revolution in Ukraine (2000-2004). Roles and activities of the dissenters, as well as their associates, the incumbent authorities and their allies are analyzed with regard to Internet-based technologies during the electoral revolution in Ukraine. The case of the Orange Revolution is particularly salient, as even though only 1-2 percent of the Ukrainian population had access to the Internet, this was sufficient to mobilize the citizens towards an eventually successful revolution. This paper lays the groundwork for further investigations into use of ICTs by political dissenters. The paper will appear in a forthcoming issue of First Monday.